Synthesis, crystal structure and ethylene polymerization activity of zirconium complexes bearing mono-Cp and tridentate Schiff base [ONO] ligands

被引:30
作者
Chen, QH [1 ]
Huang, JL [1 ]
Yu, J [1 ]
机构
[1] E China Univ Sci & Technol, Organomet Chem Lab, Shanghai 200237, Peoples R China
基金
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词
zirconium; Schiff base; tridentate ligand; ethylene polymerization;
D O I
10.1016/j.inoche.2005.02.005
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A novel zirconium complex I bearing mono-Cp and tridentate Schiff base [ONO] ligand is synthesized by the reaction of CpZrCl3 center dot DME with lithium salt of Schiff base ligand. The molecular structure of complex 1 is determined by X-ray single crystal diffraction. A nine-membered zirconoxacycle complex 2 is obtained by an intramolecular elimination of CH3Cl from complex 1. When activated by excess methylaluminoxane (Al/Zr = 2000:1), complexes I and 2 exhibit high thermal stability and high catalytic activities for ethylene polymerization [1, 769 kg PE/(mol Zr center dot h); 2, 272 kg PE/(mol Zr center dot h) at 80 degrees C]. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:444 / 448
页数:5
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